51769220 has 12 divisors (see below), whose sum is σ = 108715404. Its totient is φ = 20707680.

The previous prime is 51769217. The next prime is 51769241. The reversal of 51769220 is 2296715.

It can be written as a sum of positive squares in 2 ways, for example, as 7706176 + 44063044 = 2776^2 + 6638^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1294211 + ... + 1294250.

It is an arithmetic number, because the mean of its divisors is an integer number (9059617).

Almost surely, 2^51769220 is an apocalyptic number.

It is an amenable number.

51769220 is an abundant number, since it is smaller than the sum of its proper divisors (56946184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51769220 is a wasteful number, since it uses less digits than its factorization.

51769220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2588470 (or 2588468 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 51769220 is about 7195.0830433012. The cubic root of 51769220 is about 372.6981244128.

The spelling of 51769220 in words is "fifty-one million, seven hundred sixty-nine thousand, two hundred twenty".